V2ray Slow Dns Server

The Hidden Bottleneck: Why a Slow DNS Server Cripples Your V2Ray Connection

When using V2Ray, most users immediately suspect the proxy protocol (VMess, VLESS, Trojan) or the remote server's bandwidth when they experience lag, buffering, or timeouts. However, one of the most common—and most overlooked—culprits is a slow DNS server.

To mitigate the issues associated with slow DNS servers: v2ray slow dns server

Consequences of V2Ray Slow DNS Server Issues The Hidden Bottleneck: Why a Slow DNS Server

There are several reasons why V2Ray users may experience slow DNS server issues: Forward queries to external DNS servers (e

"dns": 
  "hosts": 
    "domain:google.com": "223.5.5.5"
  ,
  "fakeDns": 
    "ipPool": "198.18.0.0/15"

1.1.1.1 (Cloudflare) – low latency, reliable
8.8.8.8 (Google) – similar
223.5.5.5 (AliDNS) – optimized for China routes
Local AdGuard Home / Pi-hole – may introduce local delays


Forward queries to external DNS servers (e.g., 1.1.1.1, 8.8.8.8).
Resolve queries via the local system.
Use DNS over TCP, DNS over HTTPS (DoH), or DNS over QUIC to avoid poisoning.

Quick reference settings to try

Public DNS: 1.1.1.1, 1.0.0.1, 8.8.8.8, 9.9.9.9
Local DNS port: 127.0.0.1:53 or 127.0.0.1:5353 (if using another resolver)
MTU test: try 1500 → 1400 → 1350 to see where fragmentation stops

"hosts": 
  "update.v2ray.com": "104.18.33.112"